Correcting from your Chinese.  You will see the tone and nuances very differently expressed here.

气温早晚凉中午热，出门的时候穿一件风衣，包里再带一件薄一点的衣服，以便应付这多变的天气。

Cold in the mornings and nights but hot for the afternoons.  Hence when I go out, I wear a windbreaker.  Still, I carry some lighter clothes in my bag to cope with the uncanny weather.

The variable Uncanny Weather 多变得气温

Correcting by not looking at your Chinese.

The weather It is cold in the mornings and at night and but hot in during afternoons. I not only wear a dust coat but also fit into a thinner clothes in my bag for the variable weather。 In my bag, I carry some lighter clothes so as to accomodate the uncanny weather.


气温早晚凉中午热，出门的时候穿一件风衣，包里再带一件薄一点的衣服，以便应付这多变的天气。